Fiber board for containers and the like



Emmi? D. G. MAGELL FIBER BOARD FOR CONTAINERS AND THE LIKE I July w, 12.,

Filed July 51, 1922 Patented July 10, 1928.

UNITED STATES PATENT OFFICE.

IDONALD G. MAGILL, OF BROOKLYN, NEW YORK, ASSIGNOR TO. AMERICAN CAN COM- PANY, OF NEW YORK. N. Y., A CORPORATION OF NEW JERSEY.

FIBER BOARD FOR CONTAINERS AND THE LIKE.

Application filed July 31, 1922. Serial No. 578,536.

My invention relates in general to fiber cans or boxes, having more particular reference to a new treatment of fiber board used in the manufacture of such containers and resulting in a stiffened and generally improved article of this character.

A principal object of the invention is the provision of a type of treated fiber board which, by reason of its unusual stillness and strength, may be of less thickness than is ordinarily required and thus involves the use of a smaller amount of material in the for- I mation of the container, without loss of resisting qualities.

A further object of the invention is the provision of a fibrous stock particularly adapted for the foregoingpurposes which is treated with a resistance-increasing mixture having a relatively high melting point and thus being capable of being subjected to unusually high temperature, without effect upon the rigidity or strength of the container.

This relatively high melting point is of great advantage when containers or packages constructed from this improved fiber stock are filled with hot lard or other heat e'd products. It will be readily apparent that the melting point of the stiffener must be higher than the highest degree of heat of the contents in order to leave the stiffening material unaffected.

My invention produces an unusually stiff and strong fiber board and container or can involving a relatively small amount of material with greatly increased heat-resisting qualities.

Other objects and advantages of the invention will be apparent as it is better understood from the following description, which, taken in connection with the accompanying drawings discloses a preferred embodiment thereof.

Referring to the drawings:

Figure 1 is a side elevation of a fiber tube in which my invention is embodied, a part thereof being broken away for convenience of illustration; and

Fig, 2 is an enlarged sectional detail of the wall thereof.

The embodiment of the invention which I have shown on the drawing comprises merely a tube 11, which it will be understood is adapted to be closed by ends which may be smaller quantity of paper stock in a containcr than is required without such treatment.

This mixture consists of paraflin and a relatively small portion of Montan wax, or other mineral wax having the desired stifi'ening qualities and having preferably a high melting point.

Montan wax is a by-product of the dye industry and has a melting point of approximately 180 F. I have found that, when mixed with parallinc, an exceptionally high melting point is attained which, according to experiments, is considerably in excess of the mean temperature which would be expected to result from such a mixture. For example, parafl'ine, suitable for use in an impregnating compound, has a melting point of 125 F., but, when mixed with an equal amount of Montan wax, the resulting mixture has been found to have a melting point of approximately 160 F., instead of 152.5".

A suitable formula for preparation of the in'ipregnating compound includes from 10 to 25% of Montan wax, which may vary in accordance with the particular needs. it will be understood that my invention also contemplates the use of Montan wax with other waxes having a lower melting point, and of parafiine with other mineral waxes, preferably having a higher melting point, these combinations resulting in the advantageous qualities above set forth.

It is thought that the invention and many of its attendant advantages will be understood from the foregoing description, and it will be apparent that various changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope of the invention. or sacrificing all of its material advantages, the formhereinbefore, described being merely a preferred embodiment thereof I claim: 1. Fiber board, for use in the formation of can bodies and the like, comprising fibrous stock impregnntml with a mixture of 5 paraflino and Montmi waxisaid mixture having a melting point in excess of the theoretical mean melting point of the component; parts of the mixture, 'sairl impregnation produ cing a fiber board of'increasetl stifl'ness and strength,

2 A fiblOllSlJOtll'll stiflened with a mixture of pal-affine and Montzm wax combined in the approximate proportion of 10 to 25% Montan wax.

' DONALD MA GILL. 

